Bumper



Sept. 1, 1925/ 1,551,755

' A. B. LARSON BUMPER .F IQ In 1925 .41 TOR-NEX- a citizen of the United States,

Patented Sept. 1, 1925.

umrsn *srATijzs PATENT OFFICE. i edia asses rant, uinnaso'ra. i I

aii aman man e, 1925. semi No. 29,011.:

To all whom itmay comm 1 Be it known that-I, ALISON B.

residin at tate St. Paul, in the county of Ramsey and of Minnesota, have invented; certain new and useful Improvements in- Bumpers, of which the followin is as ecification. My invention re ates to hicles and the main object'is to; provide a simple' and eflicient' device particularly adapted for use on automobile trucks. Another object is to provide a bumper ofsuch construction that its'..ji inpact" bar may be as on line -5 in bar of my device.

readily swung away from its normal transverse position so'that the operator may have free access to the starting crank of the engine. J

In the accompanying drawing: Fig. 1 is a top view ofmyimprovedbumper in operative positionon the front end of a motor truck.

Fig. 2 is an enlarged sectional elevation on line 2-2 in Fig. 1 showing the holding means for the impact'bar and the adjacent front corner of the auto truck.

Figl 3 is a sectional detailview as on line 3--3 in Fig. 2. I

F ig: 4 is a sectional detail as on line 4-4 in Fig. 2.

Fig. 5'is an enlar Fig. 2 and revealing the feature for the locking eccentric take-up Referri-n to the drawing by reference numerals, have illustrated mydevme as being attached to the fdrward ends of the main frame members 6 of an .auto truck of which are shown further only the radiator G 7, hood 8,;the forward parts of the front or *eteeringwheels 9 and 10 is the engine starting crank, all of the said parts. in

-approxiniately correct relative loc ations.--

It is well known' in the automotive field"; I

"by any suitable hanger such as t e angle iron bracket 22 securedat 23 to the honrlontal web of the frame' member 11 and intermediatethe ends of bar 18 and havin that bumpers are very necessary on large mits freeaocess to the starting 'crank. My improved bumper is constructed so as to be normally in rigid transverse relation to the front end of the truck and is readily swung g tween the hanger 22 and the tooth 18 and v to one side when so desired.

My device comprises two forw'ardlyex main frame member 6 as at 12 and extending forward a Larson,

umpers for ve- .at 12; .special bolt 17 a longitudinally arranged locking bar 18 preferably madeof bar steel 'ed. sectional detail viewhookpart 18 0 frontends of these members 11 are adapted redetermined distance. The i.

to rigidly support,- horizontally; and transversely of the truck the main bumper bar 13 sometimes known as the impact bar.

In the forward end of one member-as 11 hinge member14 with a removable vertical hinge pin 15 passed throughit-and another 'lnnge member: 16 wcured as at '16 in the anddetachably fixed in the transverse position shown in full linesinFig. 1 by a special locking mechanism illustrated as mounted '(Fig; 1) e I secure as sit-14 a substantial I on the right hand frame member 11?. It

will be understood that the frame members 11 have each a deep vertical flange or web 11 which is secured to the. vehicle frame On said web 11 -I fulcrum on a and extending forward parallel to web. 11 almost totlie forward end of the member 11* The front end of said lock bar is made in the form of a book 18' directed downwardly and rearwardly and from thence the under edge of. the bar is sloped upwardly as 18*. 'The bumper bar is preferably a heavy channel iron and carries arearwardly directed T-iron 19 fixed on its web as at 20 with its leg rojecting rearwardly and in bar is in closed tposition (Figs. 1 and 2) the v the lockbar will engage in theslotted part 21 of the T-iron 19 and hold the bumperbar, the .said legof the -T-1ron said leg is a s 0t 21. Thus when the bumper engaging the, slanting face "18 of the look bar and forcing it to rise untilthe'tooth 18' drops into the slot21'as the bumper is closed.

The look bar is held from droppin too far a properly spaced vertical slot; 22 (Fig. 3

as to downward movement. 3 y

24- is a bradket' secured at 25 on-bar 18 becomprises-preferablyan angle ironwith its horizontal arm 24; projectingoutwardly and carrying avertical y directed fixed stud 26 normally withina helical coil spring 27 um Y in which the lockbar is oscillable but limited 1.

' frame member 11 (seeFi 2). .Thus the locking bar is always hel ,down in locked position bythe spring but the latter will yield upwardl when the bumper bar is swung into loc ed osition and the locking bar is thereby tilte upwardly. To release the locking bar the operator may simply put the alm of one "hand on the to arm of mem er 11 and place the fingers o the same hand under web 24 ofbracket'24 and with a squeezing action of the hand cause. the lock bar 18 to tilt upwardly, as to the dotted line the position in Fig. 2, thereby releasin h tooth 18 from lockin contact wit slotted art 21 of the and the umper is then free to be swung outwardly.

lhe fulcrum boltl'l' is an eccentric bolt, its heaviest shank part. 17 beingnext to its head and extending through a properly sized bore 18 in the lock bar andthence through a" spacing collar 28 ("see Fig: 5). 17"v is a reduced continuation of the bolt shank but is offset formin a shoulder 17 P normally directed upwardly and said shank 17 is threaded and rojects through an aperture 17 in the vertlcal web 11 Itsprotruding end carries a washer 29 and nut'SOfor tightening the eccentric boltinany desired position. It is obvious that by adjusting this bolt 17 the fulcrum of the locking bar 18 is movable horizontally and thus any wear and tear on the tooth .18 is taken up and the bum er bar .13 is held securely in nonrattlmg position and tight against thefront end of the frame member 11.

The operation of my device and its use have been fully disclosed. It is of course optional to use impact bars of various kinds and shapes of materials What I claim is: I

1. In a bumper of the class described, a

air of parallel, horizontal arms adapted to e fixed longitudinally on a vehicle frame and protruding from the end thereof, an im act bar pivotal-1y secured on the outer and of one of said armsand normally in transverse spaced relation to the adjacent end of the vehicle, means for detachably seumper member 19 curing said impact bar to the outer 'end of the adjacent. arm and comprisinga vertically, oscillable locking elementon the latter arm and a .fixed 'horizontaltongue member on the impact bar adapted to be swung into automatic locking enga ement with said locking element when t e impact bar is swung to closed position;

2. The structure s ecified in claim 1, in which said locking e ement on the arm comprises a bar arranged longitudinally of the arm" and pivotally mounted at its rear end on a pivot adjustable longitudinally of the arm, said bar having its forwardly directed end formed with a downwardly and rear wardly directed hook and a forwardly and upwardly 'directedangular face from said hook, sald fixed tongue on the impact bar having a slotted portion adapted to engage said sloping face and, be engaged by the hook of the'lock bar, and a spring element adapted to impel the locking bar in a downward. direction.

3. The s'tructure specified in claim 1, in.

slotted part adapted to engage said slopln face and be engaged by the hook of the 100 bar, and a spring element adapted to im 1 the lock bar downwardly, said ,adjusta le pivot of the lock bar comprising a cam member, the cam portion of which isv pivotally engaged in the rear end of the lock bar and the end of the cam portion engaging the face of the adjacent arm, an ofiset threaded extension of said camadapted to be inserted in an aperture in said arm and means en'- gaging said threaded art and :the arm to hold the cam in selective positions and the lockin bar in corresponding adjusted positions ongitudinallyof the arm.

In testimony whereof I afix my signature.

ALISON e. LARSON. 

